hopkins security officials promised to take a second look at it security procedures. as for why the shooting happened, it is believed that paul pardus was emotionally distraught and overwhelmed by his mother's condition. >> with more than 30,000 employees, johns hopkins medicine is among the state's largest employers, certainly the largest private employer in baltimore city. many of the employees were evacuated, and once they learned of the news, it came as quite a shock. >> to see a lot of police cars, security guards just running around frantic, it was kind of chaotic, nobody knowing what was going on. eventually, they started walking horse, telling people they could not get in or out -- a started blocking doors. >> i would never expect this, because this hospital is well secured and protected.